The need of shutters for shops in areas that are not 'naturally' supervised can give a street or a neighbourhood a grey and deprived look. A standard shutter can change a vibrant and lovely shop into a grey wall of steel and a street full of shutters can give the impression of a ghost town and the feeling of 'You had better lock your door too'.
On a visit to Seville in Spain, I saw many clever, beautiful and funny solutions to problems that can be easily overseen and sometimes also easily changed.
A bit of countryside in the city centre, to the right, through reeds and grass.
Larger, inviting bars as seen below does not promote a gated community feel and could this not be implemented on shop fronts as well, in the place of shutters in a simpler less expensive design?